| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.sharedstoragebackup; |
| |
| import android.app.Service; |
| import android.app.backup.FullBackup; |
| import android.app.backup.FullBackupDataOutput; |
| import android.app.backup.IBackupManager; |
| import android.content.Intent; |
| import android.os.Environment; |
| import android.os.IBinder; |
| import android.os.ParcelFileDescriptor; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| |
| import com.android.internal.backup.IObbBackupService; |
| |
| /** |
| * Service that the Backup Manager Services delegates OBB backup/restore operations to, |
| * because those require accessing external storage. |
| * |
| * {@hide} |
| */ |
| public class ObbBackupService extends Service { |
| static final String TAG = "ObbBackupService"; |
| static final boolean DEBUG = true; |
| |
| /** |
| * IObbBackupService interface implementation |
| */ |
| IObbBackupService mService = new IObbBackupService.Stub() { |
| /* |
| * Back up a package's OBB directory tree |
| */ |
| @Override |
| public void backupObbs(String packageName, ParcelFileDescriptor data, |
| int token, IBackupManager callbackBinder) { |
| final FileDescriptor outFd = data.getFileDescriptor(); |
| try { |
| File obbDir = Environment.buildExternalStorageAppObbDirs(packageName)[0]; |
| if (obbDir != null) { |
| if (obbDir.exists()) { |
| ArrayList<File> obbList = allFileContents(obbDir); |
| if (obbList != null) { |
| // okay, there's at least something there |
| if (DEBUG) { |
| Log.i(TAG, obbList.size() + " files to back up"); |
| } |
| final String rootPath = obbDir.getCanonicalPath(); |
| final FullBackupDataOutput out = new FullBackupDataOutput(data); |
| for (File f : obbList) { |
| final String filePath = f.getCanonicalPath(); |
| if (DEBUG) { |
| Log.i(TAG, "storing: " + filePath); |
| } |
| FullBackup.backupToTar(packageName, FullBackup.OBB_TREE_TOKEN, null, |
| rootPath, filePath, out); |
| } |
| } |
| } |
| } |
| } catch (IOException e) { |
| Log.w(TAG, "Exception backing up OBBs for " + packageName, e); |
| } finally { |
| // Send the EOD marker indicating that there is no more data |
| try { |
| FileOutputStream out = new FileOutputStream(outFd); |
| byte[] buf = new byte[4]; |
| out.write(buf); |
| } catch (IOException e) { |
| Log.e(TAG, "Unable to finalize obb backup stream!"); |
| } |
| |
| try { |
| callbackBinder.opComplete(token, 0); |
| } catch (RemoteException e) { |
| } |
| } |
| } |
| |
| /* |
| * Restore an OBB file for the given package from the incoming stream |
| */ |
| @Override |
| public void restoreObbFile(String packageName, ParcelFileDescriptor data, |
| long fileSize, int type, String path, long mode, long mtime, |
| int token, IBackupManager callbackBinder) { |
| try { |
| File outFile = Environment.buildExternalStorageAppObbDirs(packageName)[0]; |
| if (outFile != null) { |
| outFile = new File(outFile, path); |
| } |
| // outFile is null here if we couldn't get access to external storage, |
| // in which case restoreFile() will discard the data cleanly and let |
| // us proceed with the next file segment in the stream. We pass -1 |
| // for the file mode to suppress attempts to chmod() on shared storage. |
| FullBackup.restoreFile(data, fileSize, type, -1, mtime, outFile); |
| } catch (IOException e) { |
| Log.i(TAG, "Exception restoring OBB " + path, e); |
| } finally { |
| try { |
| callbackBinder.opComplete(token, 0); |
| } catch (RemoteException e) { |
| } |
| } |
| } |
| |
| ArrayList<File> allFileContents(File rootDir) { |
| final ArrayList<File> files = new ArrayList<File>(); |
| final ArrayList<File> dirs = new ArrayList<File>(); |
| |
| dirs.add(rootDir); |
| while (!dirs.isEmpty()) { |
| File dir = dirs.remove(0); |
| File[] contents = dir.listFiles(); |
| if (contents != null) { |
| for (File f : contents) { |
| if (f.isDirectory()) dirs.add(f); |
| else if (f.isFile()) files.add(f); |
| } |
| } |
| } |
| return files; |
| } |
| }; |
| |
| @Override |
| public IBinder onBind(Intent intent) { |
| return mService.asBinder(); |
| } |
| } |